If $3,500.00 is invested at 5% simple interest, how much additional money needs to be invested at 7% simple interest so the total interest per year is $553.00.
You would need to invest
at 7% simple interest (NO COMMAS).

The vertex of this parabola is at (-2,-3). when the x-value is -1, the y-value is -5. what is the coefficient of the squared expression in the parabola's equation?

Afarmer has a large field that is x feet in length. he wants to fence in a rectangular section in the middle of the field , leaving a length of 100 feet of open field behind each end of the fenced rectangle.he also wants the width of the fenced-in space to be 100 feet less than its length. find the expressions to represent the length and width of the fenced section of the field

I’m still confused on how to work the percentages